Seat for concrete beams



Patented May 19, 1925.

UNITEDv STATES ELWYN EGGLESTON SQE ELYE. WHITE PLAINS, NEW YORK.

SEAT FOB oonoanrn BEAMS.

Application filed December 29, 1923. Serial No. 683,271.

T 0 all whom it may concern.

Be it known that I, ELWYN EGGLESTON SEELYE, a citizen of the United States, and resident of White Plains, in the county of IVestchester and State of New York, have invented certain new and useful Improvements in Seats for Concrete Beams, of which the following is a specification.

This invention is an improvement in con crete beam articulators to steel beams or columns, the main objects being to provide adequate and effective suspended seats, to eliminate bending strains in the hanger and thus secure the maximum strength, and to provide a simple construction, inexpensive to manufacture.

In my improved construction I form the beam hanger of a single piece of wrought metal angle bar of standard proportions and design. The central portion of one flange is completely cut away, and the other flange is bent to U-form to provide a suspended seat curved in accordance with the linear law of loading, which is substantially a catenary curve. There is thus provided a uniform bearing between the seat and the beam, and the concrete of the beam is not subjected to destructive compressive force.

Preferably the bending of one flange to form this curved seat is in a direction to bring the uncut portions of the flange on the inside of the U, so that the maximum width of the hanger is no greater than that of the beam. These inwardly facing flanges are embedded in the end of the beam and provide additional anchorage for the beam.

A hanger in which the seat is flat and meets the suspending portions at right angles may operate satisfactorily for a flat bottomed steel or wood beam, but is not satisfactory for concrete beams, due to the low compressive value of concrete, the weakness at the angles, and the bending strains which are set up in the hanger.

In the accompanying drawing:

Fig. 1 is a face view of a hanger attached to a steel column.

Fig. 2 is a top plan view of the hanger, the column being shown in section.

Fig. 3 is a perspective view of the hanger, and

Fig. 4 is a longitudinal section through the beam and hanger.

In making my improved hanger, I take a strip of wrought metal angle bar of stand- -what I claim as new and ard shape and design, and having the usual two flanges at right angles to each other. All of the center section of one of the flanges is cut away to leave two terminal flange portions 10'l0. The angle bar is then bent to substantially Ushape so that the terminal portions 11-11 of the other flange form the legs or sides of the U, and the central portion 12 of this flange forms the curved bottom of the U. It is impor- "r tant that this central seat portion 12 be curved and that it merges into the terminal portions 11 without any definite or sharp angle. There should be a smooth curve and the curve should be in accordance with the linear law of loading. In other words the seat 12 should be substantially a catenary curve.

The flange made up of the portions 11 and 12 is preferably bent in such direction that the two flanges 10 extend toward each other and are thus within the outside diameter of the U but remain in the same plane. These flanges 10 may be riveted to any suitable support, such as a steel beani,

girder or column 13, and means of rivets 14- through the flanges 10. The proper forms may be then placed in position and reinforcing rods 15 are so placed as to rest on the seat 12. The concrete preferably extends slightly below the seat 12'so as to conceal and protect the under side of the metal forming the seat. The flanges 10 and the rivets 14, by means of preferably by which they are connected to the support,

are embedded within the concrete 16 at the end, and aid in resisting lateral movement of the concrete beam.

In making my improved hanger it will be noted that it is merely necessary to cut out a section of one flange and bend the other flange opposite to this cut-out section. to the proper curvature.

Having thus described my invention, desire to secure by Letters Patent is 1. A hanger for supporting a concrete beam from a steel frame member, comprising a single piece of wrought metal angle bar having the center section of one flange entirely cut away and the terminal portions of the angle bar disposedsubstantially parallel, with the uncut portions of the first mentioned flange projecting toward each other and the section of the other flange between said uncut portions curved upwardly at its ends to merge into said terminal portions- A. 1. .a 2. A hanger for supporting the ends of concrete beams comprising a single piece of standard angle bar having the center section of one flange entirely cut away, and the other flange bent to form a U, with the portions of said last mentioned flange op posite to the out away part being substant ial-ly in the'forin of a' caten'ary curve.

A hanger for concret'e beams, including a piece of anglebarhaving the "center section of one flange cut away and the' other fla e e? W 9 f rm w h th e' fm ei section in approximately the form of a oatenary ours e, and the terminal portions of the first mentioned flange facing each other.

i. A hanger for oonerete beams including a substantially U-shaped member with the bend of the U substantialy in the '-'form of a catenary curve and the side members of the U hayinginturned flanges for the attachment to a support.

Signed at New York, in the county of N Y k nd. e itNW Y r mhi 26th ofDeeember A. D .'1 923.

LWYN mew-ere EWE- 

